Enhanced variants of erythropoietin and methods of use

C - Chemistry – Metallurgy – 12 – N

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Details

C12N 15/18 (2006.01) A61K 38/18 (2006.01) C07K 14/505 (2006.01) C07K 16/22 (2006.01) C12P 21/02 (2006.01) C12Q 1/02 (2006.01)

Patent

CA 2504193

The invention provides a human erythropoietin polypeptide variant containing a human erythropoietin amino acid sequence having an amino acid difference in two or more different Epo-modification regions and an enhanced erythropoietin activity, or a functional fragment thereof. Also provided is a human erythropoietin polypeptide variant containing a human erythropoietin amino acid sequence having an amino acid difference in two or more different Epo- modification regions and a moderated erythropoietin activity, or a functional fragment thereof. The invention further provides a composition containing a human erythropoietin polypeptide variant having an amino acid sequence selected from SEQ ID NOS: 4, 6, 8, 14, 16, 18, 26, 28, 30, 34, 36, 38, 40, 42, 44, 48, 50, 54, 56, 60, 62, 66, 68, 70, 72, 74, 76, 82, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 112, 116, 118, 120, 122, 124, 132, 134, 138, 144, 148, 150, 152, 160, 162, 164, 166, 170, 172, 174, 184, 188, 192, 194, 196, 198, 200, 206, 210, 212, 218, 220, 222, 224, and a pharmaceutically acceptable medium.

L'invention concerne un variant polypeptidique de l'érythropoïétine humaine contenant une séquence d'acides aminés de l'érythropoïétine humaine avec une différence d'acides aminés dans deux ou plusieurs régions différentes de modification de l'EPO, et une activité d'érythropoïétine améliorée, ou un fragment fonctionnel de celui-ci. L'invention concerne également un variant polypeptidique de l'érythropoïétine humaine contenant une séquence d'acides aminés de l'érythropoïétine humaine avec une différence d'acides aminés dans deux ou plusieurs régions de modification de l'EPO, et une activité d'érythropoïétine modérée, ou un fragment fonctionnel de celui-ci. L'invention concerne enfin une composition comprenant un variant polypeptidique de l'érythropoïétine humaine contenant une séquence d'acides aminés sélectionnée parmi les séquences aux numéros d'identification suivants: 4, 6, 8, 14, 16, 18, 26, 28, 30, 34, 36, 38, 40, 42, 44, 48, 50, 54, 56, 60, 62, 66, 68, 70, 72, 74, 76, 82, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 112, 116, 118, 120, 122, 124, 132, 134, 138, 144, 148, 150, 152, 160, 162, 164, 166, 170, 172, 174, 184, 188, 192, 194, 196, 198, 200, 206, 210, 212, 218, 220, 222, 224, et un milieu acceptable d'un point de vue pharmaceutique.

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